./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_safe-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/fib_safe-6.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ca933e9c322081d61da01652cda9ceed61707699c680fd4ef3d92d3ccd39b362 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:05:53,497 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:05:53,603 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:05:53,609 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:05:53,611 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:05:53,640 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:05:53,641 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:05:53,641 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:05:53,642 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:05:53,643 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:05:53,644 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:05:53,644 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:05:53,645 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:05:53,645 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:05:53,647 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:05:53,647 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:05:53,647 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:05:53,648 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:05:53,648 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:05:53,648 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:05:53,648 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:05:53,652 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:05:53,653 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:05:53,653 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:05:53,653 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:05:53,653 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:05:53,653 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:05:53,654 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:05:53,654 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:05:53,654 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:05:53,654 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:05:53,654 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:05:53,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:05:53,655 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:05:53,655 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:05:53,655 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:05:53,656 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:05:53,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:05:53,656 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:05:53,658 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:05:53,659 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:05:53,659 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:05:53,659 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca933e9c322081d61da01652cda9ceed61707699c680fd4ef3d92d3ccd39b362 [2024-11-10 10:05:53,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:05:53,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:05:53,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:05:53,964 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:05:53,964 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:05:53,965 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_safe-6.i [2024-11-10 10:05:55,417 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:05:55,695 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:05:55,695 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-6.i [2024-11-10 10:05:55,713 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38fd02766/598df321cce74c348bc2ad0c32ef9de7/FLAG8e05d3427 [2024-11-10 10:05:55,991 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38fd02766/598df321cce74c348bc2ad0c32ef9de7 [2024-11-10 10:05:55,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:05:55,995 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:05:55,996 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:05:55,996 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:05:56,001 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:05:56,001 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:05:55" (1/1) ... [2024-11-10 10:05:56,002 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@498760ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56, skipping insertion in model container [2024-11-10 10:05:56,002 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:05:55" (1/1) ... [2024-11-10 10:05:56,047 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:05:56,464 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-6.i[30241,30254] [2024-11-10 10:05:56,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:05:56,497 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:05:56,541 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-6.i[30241,30254] [2024-11-10 10:05:56,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:05:56,592 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:05:56,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56 WrapperNode [2024-11-10 10:05:56,592 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:05:56,593 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:05:56,594 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:05:56,594 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:05:56,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56" (1/1) ... [2024-11-10 10:05:56,617 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56" (1/1) ... [2024-11-10 10:05:56,639 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2024-11-10 10:05:56,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:05:56,641 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:05:56,641 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:05:56,641 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:05:56,650 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56" (1/1) ... [2024-11-10 10:05:56,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56" (1/1) ... [2024-11-10 10:05:56,655 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56" (1/1) ... [2024-11-10 10:05:56,667 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-10 10:05:56,667 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56" (1/1) ... [2024-11-10 10:05:56,670 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56" (1/1) ... [2024-11-10 10:05:56,674 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56" (1/1) ... [2024-11-10 10:05:56,674 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56" (1/1) ... [2024-11-10 10:05:56,676 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56" (1/1) ... [2024-11-10 10:05:56,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56" (1/1) ... [2024-11-10 10:05:56,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:05:56,680 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:05:56,680 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:05:56,680 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:05:56,681 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56" (1/1) ... [2024-11-10 10:05:56,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:05:56,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:05:56,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 10:05:56,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 10:05:56,757 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-10 10:05:56,758 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-10 10:05:56,759 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-10 10:05:56,759 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-10 10:05:56,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 10:05:56,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:05:56,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:05:56,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 10:05:56,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:05:56,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:05:56,761 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:05:56,887 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:05:56,889 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:05:57,079 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:05:57,080 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:05:57,180 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:05:57,180 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:05:57,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:05:57 BoogieIcfgContainer [2024-11-10 10:05:57,181 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:05:57,183 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:05:57,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:05:57,186 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:05:57,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:05:55" (1/3) ... [2024-11-10 10:05:57,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b29c7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:05:57, skipping insertion in model container [2024-11-10 10:05:57,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:56" (2/3) ... [2024-11-10 10:05:57,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b29c7ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:05:57, skipping insertion in model container [2024-11-10 10:05:57,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:05:57" (3/3) ... [2024-11-10 10:05:57,192 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-6.i [2024-11-10 10:05:57,210 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:05:57,211 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:05:57,212 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:05:57,265 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:05:57,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 38 transitions, 84 flow [2024-11-10 10:05:57,324 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-11-10 10:05:57,324 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:05:57,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 36 events. 7/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 55 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-11-10 10:05:57,331 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 38 transitions, 84 flow [2024-11-10 10:05:57,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 36 transitions, 78 flow [2024-11-10 10:05:57,353 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:05:57,363 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7766d237, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:05:57,363 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:05:57,380 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:05:57,381 INFO L124 PetriNetUnfolderBase]: 7/35 cut-off events. [2024-11-10 10:05:57,381 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:05:57,381 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:05:57,382 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:05:57,382 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:05:57,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:05:57,388 INFO L85 PathProgramCache]: Analyzing trace with hash -850951809, now seen corresponding path program 1 times [2024-11-10 10:05:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:05:57,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242147858] [2024-11-10 10:05:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:05:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:05:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:05:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:57,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:05:57,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242147858] [2024-11-10 10:05:57,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242147858] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:05:57,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:05:57,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:05:57,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93022615] [2024-11-10 10:05:57,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:05:57,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:05:57,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:05:57,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:05:57,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:05:57,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 38 [2024-11-10 10:05:57,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 78 flow. Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:05:57,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:05:57,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 38 [2024-11-10 10:05:57,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:05:57,817 INFO L124 PetriNetUnfolderBase]: 233/436 cut-off events. [2024-11-10 10:05:57,817 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:05:57,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 436 events. 233/436 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2024 event pairs, 159 based on Foata normal form. 90/493 useless extension candidates. Maximal degree in co-relation 791. Up to 358 conditions per place. [2024-11-10 10:05:57,826 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 21 selfloop transitions, 0 changer transitions 1/32 dead transitions. [2024-11-10 10:05:57,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 114 flow [2024-11-10 10:05:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:05:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:05:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 50 transitions. [2024-11-10 10:05:57,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-11-10 10:05:57,838 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 78 flow. Second operand 2 states and 50 transitions. [2024-11-10 10:05:57,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 114 flow [2024-11-10 10:05:57,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 10:05:57,842 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 66 flow [2024-11-10 10:05:57,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=66, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-11-10 10:05:57,847 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2024-11-10 10:05:57,847 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 66 flow [2024-11-10 10:05:57,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:05:57,848 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:05:57,848 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:05:57,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:05:57,849 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:05:57,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:05:57,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1924301250, now seen corresponding path program 1 times [2024-11-10 10:05:57,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:05:57,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38905246] [2024-11-10 10:05:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:05:57,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:05:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:05:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:57,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:05:57,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38905246] [2024-11-10 10:05:57,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38905246] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:05:57,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:05:57,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:05:57,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756239390] [2024-11-10 10:05:57,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:05:57,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:05:57,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:05:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:05:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:05:57,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:05:57,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:05:57,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:05:57,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:05:57,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:05:58,093 INFO L124 PetriNetUnfolderBase]: 265/484 cut-off events. [2024-11-10 10:05:58,094 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:05:58,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 902 conditions, 484 events. 265/484 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2238 event pairs, 39 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 899. Up to 305 conditions per place. [2024-11-10 10:05:58,099 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 29 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-11-10 10:05:58,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 146 flow [2024-11-10 10:05:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:05:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:05:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-10 10:05:58,103 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2024-11-10 10:05:58,103 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 66 flow. Second operand 3 states and 65 transitions. [2024-11-10 10:05:58,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 146 flow [2024-11-10 10:05:58,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 146 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:05:58,107 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 78 flow [2024-11-10 10:05:58,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-11-10 10:05:58,108 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-11-10 10:05:58,109 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 78 flow [2024-11-10 10:05:58,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:05:58,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:05:58,109 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:05:58,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:05:58,110 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:05:58,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:05:58,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1884553586, now seen corresponding path program 1 times [2024-11-10 10:05:58,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:05:58,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721178305] [2024-11-10 10:05:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:05:58,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:05:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:05:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:58,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:05:58,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721178305] [2024-11-10 10:05:58,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721178305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:05:58,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800462088] [2024-11-10 10:05:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:05:58,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:05:58,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:05:58,218 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:05:58,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:05:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:05:58,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-10 10:05:58,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:05:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:58,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:05:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:58,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800462088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:05:58,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:05:58,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-10 10:05:58,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227184905] [2024-11-10 10:05:58,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:05:58,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 10:05:58,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:05:58,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 10:05:58,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-10 10:05:58,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:05:58,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:05:58,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:05:58,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:05:58,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:05:58,552 INFO L124 PetriNetUnfolderBase]: 361/676 cut-off events. [2024-11-10 10:05:58,553 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-11-10 10:05:58,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1353 conditions, 676 events. 361/676 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3233 event pairs, 39 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 1348. Up to 305 conditions per place. [2024-11-10 10:05:58,561 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 53 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2024-11-10 10:05:58,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 67 transitions, 270 flow [2024-11-10 10:05:58,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:05:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:05:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-11-10 10:05:58,565 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5570175438596491 [2024-11-10 10:05:58,565 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 78 flow. Second operand 6 states and 127 transitions. [2024-11-10 10:05:58,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 67 transitions, 270 flow [2024-11-10 10:05:58,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 67 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:05:58,569 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 112 flow [2024-11-10 10:05:58,569 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2024-11-10 10:05:58,570 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2024-11-10 10:05:58,570 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 112 flow [2024-11-10 10:05:58,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:05:58,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:05:58,571 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:05:58,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 10:05:58,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:05:58,776 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:05:58,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:05:58,777 INFO L85 PathProgramCache]: Analyzing trace with hash 291669886, now seen corresponding path program 2 times [2024-11-10 10:05:58,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:05:58,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275382309] [2024-11-10 10:05:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:05:58,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:05:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:05:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:58,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:05:58,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275382309] [2024-11-10 10:05:58,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275382309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:05:58,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711804425] [2024-11-10 10:05:58,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:05:58,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:05:58,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:05:58,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:05:58,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:05:59,013 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:05:59,013 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:05:59,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:05:59,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:05:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:59,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:05:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:59,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711804425] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:05:59,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:05:59,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-10 10:05:59,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669514705] [2024-11-10 10:05:59,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:05:59,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 10:05:59,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:05:59,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 10:05:59,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-10 10:05:59,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:05:59,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 112 flow. Second operand has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:05:59,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:05:59,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:05:59,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:05:59,431 INFO L124 PetriNetUnfolderBase]: 553/1060 cut-off events. [2024-11-10 10:05:59,431 INFO L125 PetriNetUnfolderBase]: For 1792/1792 co-relation queries the response was YES. [2024-11-10 10:05:59,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2381 conditions, 1060 events. 553/1060 cut-off events. For 1792/1792 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5266 event pairs, 39 based on Foata normal form. 96/1139 useless extension candidates. Maximal degree in co-relation 2373. Up to 305 conditions per place. [2024-11-10 10:05:59,438 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 101 selfloop transitions, 11 changer transitions 0/121 dead transitions. [2024-11-10 10:05:59,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 121 transitions, 532 flow [2024-11-10 10:05:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 10:05:59,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 10:05:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-11-10 10:05:59,442 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5482456140350878 [2024-11-10 10:05:59,443 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 112 flow. Second operand 12 states and 250 transitions. [2024-11-10 10:05:59,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 121 transitions, 532 flow [2024-11-10 10:05:59,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 121 transitions, 524 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-10 10:05:59,452 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 188 flow [2024-11-10 10:05:59,452 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=188, PETRI_PLACES=60, PETRI_TRANSITIONS=41} [2024-11-10 10:05:59,453 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2024-11-10 10:05:59,454 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 188 flow [2024-11-10 10:05:59,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:05:59,455 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:05:59,455 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:05:59,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 10:05:59,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-10 10:05:59,656 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:05:59,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:05:59,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1326760610, now seen corresponding path program 3 times [2024-11-10 10:05:59,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:05:59,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162976631] [2024-11-10 10:05:59,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:05:59,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:05:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:05:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:59,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:05:59,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162976631] [2024-11-10 10:05:59,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162976631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:05:59,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871468126] [2024-11-10 10:05:59,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:05:59,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:05:59,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:05:59,890 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:05:59,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:05:59,967 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-10 10:05:59,967 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:05:59,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-10 10:05:59,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:06:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:00,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:06:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:00,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871468126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:06:00,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:06:00,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 17 [2024-11-10 10:06:00,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020369537] [2024-11-10 10:06:00,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:06:00,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-10 10:06:00,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:06:00,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-10 10:06:00,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-10 10:06:00,207 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:06:00,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 188 flow. Second operand has 17 states, 17 states have (on average 12.764705882352942) internal successors, (217), 17 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:06:00,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:06:00,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:06:00,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:06:00,558 INFO L124 PetriNetUnfolderBase]: 681/1316 cut-off events. [2024-11-10 10:06:00,558 INFO L125 PetriNetUnfolderBase]: For 6160/6160 co-relation queries the response was YES. [2024-11-10 10:06:00,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3348 conditions, 1316 events. 681/1316 cut-off events. For 6160/6160 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 6585 event pairs, 39 based on Foata normal form. 64/1363 useless extension candidates. Maximal degree in co-relation 3333. Up to 305 conditions per place. [2024-11-10 10:06:00,568 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 133 selfloop transitions, 15 changer transitions 0/157 dead transitions. [2024-11-10 10:06:00,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 157 transitions, 740 flow [2024-11-10 10:06:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 10:06:00,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-10 10:06:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 328 transitions. [2024-11-10 10:06:00,570 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5394736842105263 [2024-11-10 10:06:00,570 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 188 flow. Second operand 16 states and 328 transitions. [2024-11-10 10:06:00,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 157 transitions, 740 flow [2024-11-10 10:06:00,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 157 transitions, 696 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-11-10 10:06:00,578 INFO L231 Difference]: Finished difference. Result has 74 places, 45 transitions, 224 flow [2024-11-10 10:06:00,579 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=224, PETRI_PLACES=74, PETRI_TRANSITIONS=45} [2024-11-10 10:06:00,579 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2024-11-10 10:06:00,580 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 45 transitions, 224 flow [2024-11-10 10:06:00,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 12.764705882352942) internal successors, (217), 17 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:06:00,580 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:06:00,580 INFO L204 CegarLoopForPetriNet]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:06:00,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 10:06:00,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:06:00,785 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:06:00,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:06:00,785 INFO L85 PathProgramCache]: Analyzing trace with hash -547412322, now seen corresponding path program 4 times [2024-11-10 10:06:00,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:06:00,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076752799] [2024-11-10 10:06:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:06:00,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:06:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:06:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:02,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:06:02,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076752799] [2024-11-10 10:06:02,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076752799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:06:02,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625722271] [2024-11-10 10:06:02,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:06:02,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:06:02,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:06:02,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:06:02,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:06:02,166 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:06:02,166 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:06:02,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-10 10:06:02,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:06:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 156 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:03,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:06:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:04,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625722271] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:06:04,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:06:04,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 59 [2024-11-10 10:06:04,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6503152] [2024-11-10 10:06:04,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:06:04,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-10 10:06:04,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:06:04,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-10 10:06:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=3023, Unknown=0, NotChecked=0, Total=3540 [2024-11-10 10:06:04,301 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:06:04,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 45 transitions, 224 flow. Second operand has 60 states, 60 states have (on average 12.283333333333333) internal successors, (737), 60 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:06:04,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:06:04,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:06:04,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:06:22,684 INFO L124 PetriNetUnfolderBase]: 15682/30856 cut-off events. [2024-11-10 10:06:22,684 INFO L125 PetriNetUnfolderBase]: For 49074/49278 co-relation queries the response was YES. [2024-11-10 10:06:22,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73418 conditions, 30856 events. 15682/30856 cut-off events. For 49074/49278 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 266312 event pairs, 82 based on Foata normal form. 0/28854 useless extension candidates. Maximal degree in co-relation 73399. Up to 5364 conditions per place. [2024-11-10 10:06:22,867 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 580 selfloop transitions, 585 changer transitions 701/1875 dead transitions. [2024-11-10 10:06:22,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 1875 transitions, 10759 flow [2024-11-10 10:06:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2024-11-10 10:06:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2024-11-10 10:06:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 3422 transitions. [2024-11-10 10:06:22,877 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2024-11-10 10:06:22,878 INFO L175 Difference]: Start difference. First operand has 74 places, 45 transitions, 224 flow. Second operand 177 states and 3422 transitions. [2024-11-10 10:06:22,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 1875 transitions, 10759 flow [2024-11-10 10:06:23,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 1875 transitions, 9489 flow, removed 306 selfloop flow, removed 11 redundant places. [2024-11-10 10:06:23,041 INFO L231 Difference]: Finished difference. Result has 309 places, 684 transitions, 4892 flow [2024-11-10 10:06:23,041 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=177, PETRI_FLOW=4892, PETRI_PLACES=309, PETRI_TRANSITIONS=684} [2024-11-10 10:06:23,042 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 273 predicate places. [2024-11-10 10:06:23,042 INFO L471 AbstractCegarLoop]: Abstraction has has 309 places, 684 transitions, 4892 flow [2024-11-10 10:06:23,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 12.283333333333333) internal successors, (737), 60 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:06:23,044 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:06:23,044 INFO L204 CegarLoopForPetriNet]: trace histogram [15, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:06:23,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 10:06:23,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:06:23,249 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:06:23,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:06:23,250 INFO L85 PathProgramCache]: Analyzing trace with hash -804028051, now seen corresponding path program 1 times [2024-11-10 10:06:23,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:06:23,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601256198] [2024-11-10 10:06:23,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:06:23,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:06:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:06:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:24,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:06:24,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601256198] [2024-11-10 10:06:24,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601256198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:06:24,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502431199] [2024-11-10 10:06:24,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:06:24,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:06:24,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:06:24,369 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:06:24,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 10:06:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:06:24,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-10 10:06:24,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:06:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 156 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:25,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:06:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:26,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502431199] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:06:26,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:06:26,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 66 [2024-11-10 10:06:26,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903014359] [2024-11-10 10:06:26,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:06:26,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-10 10:06:26,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:06:26,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-10 10:06:26,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=3876, Unknown=0, NotChecked=0, Total=4422 [2024-11-10 10:06:26,458 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:06:26,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 684 transitions, 4892 flow. Second operand has 67 states, 67 states have (on average 12.328358208955224) internal successors, (826), 67 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:06:26,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:06:26,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:06:26,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand